<template>
    <!-- 底部 -->
    <div class="my-footer">
        <!-- 全选 -->
        <div class="custom-control custom-checkbox">
            <input type="checkbox" class="custom-control-input" id="footerCheck" v-model="allCheck" />
            <label class="custom-control-label" for="footerCheck">全选</label>
        </div>
        <!-- 合计 -->
        <div>
            <span>合计:</span>
            <span class="price">¥ {{ allPrice }}</span>
        </div>
        <!-- 按钮 -->
        <button type="button" class="footer-btn btn btn-primary">结算( {{ allCount }})</button>
    </div>
</template>

<script>
export default {
    data() {
        return {}
    },
    props: {
        list: Array,
    },
    computed: {
        allCheck: {
            get() {
                return this.list.every((item) => item.goods_state)
            },
            set(val) {
                this.$emit('changAll', val)
            },
        },
        allPrice() {
            return this.list.reduce((sum, item) => {
                if (item.goods_state) {
                    sum += item.goods_count * item.goods_price
                }
                return sum
            }, 0)
        },

        allCount() {
            return this.list.reduce((sum, item) => {
                if (item.goods_state) {
                    sum += item.goods_count
                }
                return sum
            }, 0)
        },
    },
}
</script>

<style lang="less" scoped>
.my-footer {
    position: fixed;
    z-index: 2;
    bottom: 0;
    width: 100%;
    height: 50px;
    border-top: 1px solid #ccc;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 10px;
    background: #fff;

    .price {
        color: red;
        font-weight: bold;
        font-size: 15px;
    }
    .footer-btn {
        min-width: 80px;
        height: 30px;
        line-height: 30px;
        border-radius: 25px;
        padding: 0;
    }
}
</style>
